首页> 外文OA文献 >A Raman spectroscopic study of M2+M3+ sulfate minerals, römerite Fe2+Fe23+ (SO4)4· 14H2O and botryogen Mg2+Fe3+ (SO4)2(OH)·7H2Oudud
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A Raman spectroscopic study of M2+M3+ sulfate minerals, römerite Fe2+Fe23+ (SO4)4· 14H2O and botryogen Mg2+Fe3+ (SO4)2(OH)·7H2Oudud

机译:拉曼光谱研究M2 + M3 +硫酸盐矿物,锰铁矿Fe2 + Fe23 +(SO4)4·14H2O和葡萄孢菌Mg2 + Fe3 +(SO4)2(OH)·7H2O ud ud

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摘要

The mixed valency (M2+M3+) sulphate minerals, römerite Fe2+Fe23+(SO4)4•14H2O and botryogen Mg2+Fe3+(SO4)2(OH).7H2O have been studied by Raman spectroscopy. The Raman spectra of the two types of crystals proved very similar but not identical. The observation of two symmetric stretching modes confirmed the presence of the two non-equivalent sulphate units in the römerite structure. The observation of multiple bands in the antisymmetric stretching region and in the bending regions proves the symmetry of the sulphate anion is significantly reduced in the römerite structure. The number of Raman bands related to the (SO4)2- symmetric and antisymmetric vibrations support the X-ray single crystal structure conclusion that two symmetrically distinct S6+ are present in the structure of botryogen. Römerite is a mineral of environmental significance as it is commonly found in tailings and dumps.
机译:通过拉曼光谱法研究了混合价态(M2 + M3 +)的硫酸盐矿物,锰铁矿Fe2 + Fe23 +(SO4)4•14H2O和金属硼化物Mg2 + Fe3 +(SO4)2(OH).7H2O。两种晶体的拉曼光谱证明非常相似,但不完全相同。对两种对称拉伸模式的观察证实了菱铁矿结构中存在两个非等价的硫酸盐单元。在反对称拉伸区域和弯曲区域中观察到多个谱带,证明在菱铁矿结构中硫酸根阴离子的对称性显着降低。与(SO4)2-对称和反对称振动相关的拉曼带的数量支持X射线单晶结构的结论,即在Botryogen结构中存在两个对称不同的S6 +。 Römerite是一种对环境具有重要意义的矿物,因为它常见于尾矿和垃圾场。

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